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Reverse electrodialysis reactor, wastewater treatment device and application thereof

A technology for reverse electrodialysis and wastewater treatment, applied in the field of electrochemistry

Inactive Publication Date: 2020-06-09
江苏金舵环境科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these studies have always been unable to avoid the disadvantages of high power consumption of electrochemical wastewater treatment technology.

Method used

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  • Reverse electrodialysis reactor, wastewater treatment device and application thereof
  • Reverse electrodialysis reactor, wastewater treatment device and application thereof
  • Reverse electrodialysis reactor, wastewater treatment device and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1: Wastewater treatment of a pesticide enterprise:

[0045] A certain chlorfenapyr production wastewater discharged from different production sections contained the highest sodium chloride 131.89g / L, and the corresponding COD content was 215392mg / L. The minimum sodium chloride content is 12.25g / L, and the corresponding COD content is 130048mg / L. The organic wastewater containing high and low salt is introduced into the self-made electrolysis reactor equipped with titanium-based iridium dioxide-coated DSA anode plate, carbon felt cathode plate and 60 sets of anion and cation exchange membranes. The flow rate of each peristaltic pump is 200mL / min. The electrolyte is 200mL, and the current density is 1.8A / m continuously generated during the continuous reaction process 2 , The reaction runs for 4 hours to measure the COD content of the wastewater in the cathode and anode chambers, and replace 200mL of the original wastewater. The reaction can continuously obtain a...

Embodiment 2

[0046] Embodiment 2: Treatment of certain dichloronicotinic acid wastewater

[0047] The dichloronicotinic acid wastewater of an enterprise contains 165.96g / l of sodium chloride and 26500mg / l of COD. This wastewater is introduced into the above-mentioned introduction as high-salt wastewater. Equipped with titanium-based iridium dioxide-plated DSA anode plate, carbon felt cathode plate and 60 groups of anion and cation exchange membranes in a self-made reactor. The enterprise's production reuse water is used as low-salt wastewater, and its sodium chloride content is 2.5g / L. The flow rate of each peristaltic pump is 200mL / min. The cathode and anode chamber electrolyte is 200mL, and the current density is continuously generated at 2.3A / m during the continuous reaction process 2 , The reaction runs for 3 hours to measure the COD content of the wastewater in the cathode and anode chambers, and replace 200mL of the original wastewater. The reaction can continue to obtain about 65...

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Abstract

The invention discloses a reverse electrodialysis reactor, a wastewater treatment device and an application thereof. The ion exchanger comprises a cathode chamber, an anode chamber and two shells, thecathode chamber and the anode chamber are arranged between the shells, a plurality of ion exchange units are arranged between the anode chamber and the cathode chamber, and each ion exchange unit comprises a cation exchange membrane, a first plastic net-shaped gasket, an anion exchange membrane and a second plastic net-shaped gasket; a high-salt water channel and a low-salt water channel are formed in the ion exchange unit, water flow channels are formed in the first plastic net-shaped gasket and the second plastic net-shaped gasket, and the water flow channels are correspondingly communicated with the high-salt wastewater channel and the low-salt wastewater channel respectively; the lower part of the shell is provided with a low-salt wastewater inlet and a high-salt wastewater inlet, andthe upper part is provided with a high-salt wastewater outlet and a low-salt wastewater outlet; electric energy is generated by utilizing salinity gradient existing in the wastewater, and is appliedto electrochemical degradation of organic pollutants in the wastewater in combination with active chlorine indirect electrochemical oxidation of an electrode and an electro-Fenton mechanism of a cathode, so that organic matters in the wastewater can be removed without an external electric field.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a reverse electrodialysis reactor, a waste water treatment device and applications thereof. Background technique [0002] As the problem of water pollution becomes more and more serious, the legislative requirements for sewage discharge in various countries are becoming increasingly stringent. The technology of using electrochemical catalytic oxidation to treat refractory biodegradable organic pollutants has attracted extensive attention of researchers. Compared with other types of wastewater treatment technologies, the main advantages of electrochemical methods are mild reaction conditions, flexible operation, easy automation, strong selectivity, and no secondary pollution. A large number of studies have focused on evaluating various electrochemical catalytic technologies and trying to find a more suitable and efficient operating conditions and reaction equipment. Ho...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F101/30
CPCC02F1/4693C02F2101/30
Inventor 马鹏飞李金城郝晓刚
Owner 江苏金舵环境科技有限公司
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